Yealink SIP‑T21(P) E2 is an enterprise‑grade IP phone with dual SIP accounts, PoE, HD audio and a 132 × 64 backlit LCD.
The Yealink SIP‑T21(P) E2 is a high‑definition enterprise IP phone featuring dual SIP accounts, 3‑way conferencing, dual Gigabit PoE ports, and a backlit 132 × 64 pixel grayscale LCD that supports Chinese display. It includes advanced security such as SRTP, TLS, 802.1X, and supports a wide range of audio codecs including Opus, G.722, G.711, G.729AB, G.726, iLBC and optional AMR‑WB.
The device is designed for easy deployment with zero‑touch provisioning via Yealink RPS, FTP/TFTP/HTTP/HTTPS, and PnP auto‑configuration. Physical specs include a compact 209 × 188 × 150 × 41 mm chassis, PoE Class 2 power consumption of 1.3‑1.8 W, and optional 5 V/600 mA power adapter. It is suitable for small‑to‑medium businesses, call centers, and government users. This manual is written in Chinese.
| Screen resolution | 132 × 64 pixels |
|---|---|
| Power consumption (PoE) | 1.3 W‑1.8 W |
| Dimensions (W × D × H × T) | 209 mm × 188 mm × 150 mm × 41 mm |
| Power adapter output | 5 V / 600 mA DC |
| Supported audio codecs | Opus, G.722, G.711, G.729AB, G.726, iLBC, AMR‑WB (optional) |
It supports two SIP accounts.
Yes, it supports PoE (IEEE 802.3af) Class 2.
The LCD screen has a resolution of 132 × 64 pixels.
Supported codecs include Opus, G.722, G.711, G.729AB, G.726, iLBC, and optional AMR‑WB.